Overview
The LC709203FQH-01TWG is a battery fuel gauge integrated circuit (IC) designed by onsemi for measuring the remaining power level of 1-cell lithium-ion (Li+) batteries. It is part of the Smart LiB Gauge family and utilizes the HG-CVR algorithm to provide accurate Relative State of Charge (RSOC) information without the need for an external sense resistor. This IC is particularly useful in portable electronic devices, offering high precision and low power consumption.
Key Specifications
| Parameter | Symbol | Pin/Remarks | Conditions | Specification Unit | Min | Typ | Max |
|---|---|---|---|---|---|---|---|
| Maximum Supply Voltage | VDD | VDD | - | V | -0.3 | - | 6.5 |
| Operating Supply Voltage | VDD | VDD | - | V | 2.5 | 4.5 | - |
| High Level Input Voltage | VIH | SDA, SCL | 2.5 to 4.5 V | V | 0.7VDD | - | 1.4 |
| Low Level Input Voltage | VIL | SDA, SCL | 2.5 to 4.5 V | V | 0.25VDD | - | 0.5 |
| Operating Ambient Temperature | Topr | - | - | °C | -40 | - | 85 |
| Storage Ambient Temperature | Tstg | - | - | °C | -55 | - | 125 |
| Allowable Power Dissipation | Pd max | WDFN8 | Ta = -40 to +85°C | mW | - | - | 480 |
| Consumption Current (Operational Mode) | IDD | VDD | 2.5 to 4.5 V | µA | - | 3 | 4.5 |
| Voltage Measurement Accuracy | VME | VDD | Ta = +25°C | mV/cell | -7.5 | - | 7.5 |
Key Features
- HG-CVR Algorithm Technology: Provides accurate RSOC information without the need for an external sense resistor.
- High Accuracy: Offers 2.8% accuracy of RSOC and accurate RSOC of aging batteries.
- Precision Voltage Measurement: ±7.5 mV accuracy.
- Low Power Consumption: 3 µA operational mode and 1 µA sleep mode.
- Temperature Compensation: Sense thermistor input via I2C.
- Alerts: Alerts for low RSOC and/or low voltage.
- I2C Interface: Supports up to 400 kHz.
- Package Options: Available in WDFN8 (3x4, 0.65P) and WLCSP9 (1.60x1.76) lead-free packages.
Applications
- Wireless Handsets
- Smartphones/PDA Devices
- MP3 Players
- Digital Cameras
- Portable Game Players
- USB-related Devices
Q & A
- What is the primary function of the LC709203FQH-01TWG IC?
The primary function is to measure the remaining power level of 1-cell lithium-ion (Li+) batteries. - What algorithm does the LC709203FQH-01TWG use for battery state of charge measurement?
The HG-CVR algorithm. - Does the LC709203FQH-01TWG require an external sense resistor?
No, it does not require an external sense resistor. - What is the accuracy of the RSOC measurement?
The accuracy is 2.8%. - What are the operating and storage temperature ranges for the LC709203FQH-01TWG?
Operating: -40°C to +85°C, Storage: -55°C to +125°C. - What is the power consumption in operational and sleep modes?
Operational mode: 3 µA, Sleep mode: 1 µA. - Does the LC709203FQH-01TWG support temperature compensation?
Yes, it supports temperature compensation via thermistor input through I2C. - What types of alerts does the LC709203FQH-01TWG provide?
Alerts for low RSOC and/or low voltage. - What is the maximum frequency supported by the I2C interface?
Up to 400 kHz. - In what packages is the LC709203FQH-01TWG available?
WDFN8 (3x4, 0.65P) and WLCSP9 (1.60x1.76) lead-free packages.
